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Mathematics

Answered

What is the exact value for cos(-2[tex] \pi [/tex]/3)?
This should be done without a calculator.
Please explain the process if possible.

Answer :

jdoe0001 jdoe0001

Today at 4:39 AM

notice the picture below

see where that angle is?

check your Unit Circle for that value

also notice, that fractions of [tex]\pi[/tex] are just like grabbing 180 degrees and splitting it, so one third of 180 or [tex]\pi[/tex] is 180/3 or 60 degrees

${teks-lihat-gambar} jdoe0001

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